display INFINITI QX56 2009 Factory Service Manual

DIAGNOSIS SYSTEM (BCM)WT-11
< FUNCTION DIAGNOSIS >
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DIAGNOSIS SYSTEM (BCM)
CONSULT-III Function (BCM)INFOID:0000000003772370
CONSULT-III DIAGNOSTIC MODES
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
DESCRIPTION
During driving, the tire pressure monitoring system receives the signal transmitted from the transmitter
installed in each wheel, and turns on the low tire pressure warning lamp when the tire pressure becomes low.
The control unit (BCM) for this system has pr essure judgement and self-diagnosis functions.
FUNCTION
When the tire pressure monitoring system detects low infl ation pressure or an internal malfunction, the low tire
pressure warning lamp in the combination meter comes on. The malfunction is indicated by the low tire pres-
sure warning lamp flashing.
CONSULT-III Application to Ti re Pressure Monitoring System
× : Applicable
– : Not applicable
Data Monitor Mode
Diagnostic mode Description
WORK SUPPORT Supports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are re-
ceived from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
ITEMSELF-DIAGNOSTIC RESULTS DATA MONITOR
Front - Left transmitter ××
Front - Right transmitter ××
Rear - Left transmitter ××
Rear - Right transmitter ××
Warning lamp —×
Vehicle speed ××
CAN Communication ××
MONITORCONDITION SPECIFICATION
VHCL SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL • Drive vehicle for a few minutes.
Tire pressure (kPa or psi)
or
• Ignition switch ON and activation tool is transmitting activation signals.
Revision: December 20092009 QX56

WT-12
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or the actual malfunction location may be different from that displayed on
CONSULT-III.
Self-Diagnosis (With CONSULT-III)INFOID:0000000003772371
DESCRIPTION
During driving, the tire pressure monitoring system receives the signal trans mitted from the transmitter
installed in each wheel, and turns on the low tire pressure warning lamp when the tire pressure becomes low.
The control unit (BCM) for this system has pressure judgement and self-diagnosis functions.
FUNCTION
When the tire pressure monitoring system detects low inflation pressure or an internal malfunction, the low tire
pressure warning lamp in the combination meter comes on. The malfunction is indicated by the low tire pres-
sure warning lamp flashing.
CONSULT-III Application to Tire Pressure Monitoring System
× : Applicable
– : Not applicable
Data Monitor Mode
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or the actual malfunction location may be different from that displayed on
CONSULT-III. ID REGST FL1
ID REGST FR1
ID REGST RR1
ID REGST RL1
Ignition switch ON ID not registered: YET
ID registered: DONE
WARNING LAMP Low tire pressure
warning lamp on: ON
Low tire pressure warning lamp off: OFF
MONITOR
CONDITION SPECIFICATION
ITEMSELF-DIAGNOSTIC RESULTS DATA MONITOR
Front - Left transmitter ××
Front - Right transmitter ××
Rear - Left transmitter ××
Rear - Right transmitter ××
Warning lamp —×
Vehicle speed ××
CAN Communication ××
MONITORCONDITION SPECIFICATION
VHCL SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL • Drive vehicle for a few minutes.
Tire pressure (kPa or psi)
or
• Ignition switch ON and activation tool is transmitting activation signals.
ID REGST FL1
ID REGST FR1
ID REGST RR1
ID REGST RL1 Ignition switch ON ID not registered: YET
ID registered: DONE
WARNING LAMP Low tire pressure
warning lamp on: ON
Low tire pressure warning lamp off: OFF
Revision: December 20092009 QX56

WT-14
< COMPONENT DIAGNOSIS >
C1708 - C1711 DATA FROM TRANSMITTER NOT BEING RECEIVED
COMPONENT DIAGNOSIS
C1708 - C1711 DATA FROM TRANSMITTER NOT BEING RECEIVED
DescriptionINFOID:0000000003772372
Tire pressure data for one or more transmitters is not being received by the BCM.
DTC LogicINFOID:0000000003772373
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Refer to WT-14, "
Data from Transmitter Not Being Received".
Data from Transmitter Not Being ReceivedINFOID:0000000003772374
MALFUNCTION CODE NO. 21, 22, 23 OR 24 (DTC C1708, C1709, C1710 OR C1711)
1.CHECK BCM
Drive for several minutes. Check all tire pressures with CONSULT-III.
Are all tire pressures displayed as 0 kPa?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK TIRE PRESSURE RECEIVER CONNECTOR
Check tire pressure receiver connector for damage or loose connection.
Is tire pressure receiver connector damaged or loose?
YES >> Repair or replace tire pressure receiver connector.
NO >> Replace BCM, then GO TO 3. Refer to BCS-56, "
Removal and Installation".
3.PERFORM ID REGISTRATION
Carry out ID registration of all transmitters. Refer to WT-6, "
ID Registration Procedure".
Is there a tire that cannot register ID?
YES >> Replace malfunctioning transmitter, then GO TO 5. Refer to WT-43, "Transmitter (Pressure Sen-
sor)".
NO >> GO TO 4
4.DRIVE VEHICLE
1. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
2. Check all tire pressures with CONSULT-III within 15 minutes after vehicle speed becomes 17 km/h (11 MPH).
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
DTC CONSULT-III DTC detecting condition
C1708 [NO - DATA] - FL Data from FL transmitter cannot be received.
C1709 [NO - DATA] - FR Data from FR transmitter cannot be received.
C1710 [NO - DATA] - RR Data from RR transmitter cannot be received.
C1711 [NO - DATA] - RL Data from RL transmitter cannot be received.
Revision: December 20092009 QX56

C1708 - C1711 DATA FROM TRANSMITTER NOT BEING RECEIVED
WT-15
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YES >> Inspection End.
NO >> GO TO 5
5.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Proceed to the inspection applicable to DTC.
Special Repair RequirementINFOID:0000000003772375
Perform preliminary check. Refer to WT-5, "Preliminary Check".
Revision: December 20092009 QX56

WT-16
< COMPONENT DIAGNOSIS >
C1712 - C1715, C1720 - C1723, C1724 - C1727 TRANSMITTER MALFUNCTION
C1712 - C1715, C1720 - C1723, C1724 - C1727 TRANSMITTER MALFUNC-
TION
DescriptionINFOID:0000000003772376
One or more transmitters are malfunctioning internally.
DTC LogicINFOID:0000000003772377
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DRIVE VEHICLE
1. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
2. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Refer to WT-16, "
Transmitter Malfunction".
Transmitter MalfunctionINFOID:0000000003772378
MALFUNCTION CODE NO. 31, 32, 33, 34, 41, 42, 43, 44, 45, 46, 47 OR 48 (DTC C1712, C1713,
C1714, C1715, C1720, C1721, C2722, C1723, C1724, C1725, C1726 OR C1727)
1.PERFORM ID REGISTRATION
1. Carry out ID registration of all transmitters. Refer to WT-6, "
ID Registration Procedure".
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
>> GO TO 2
2.REPLACE TRANSMITTER
1. Check low tire pressure warning lamp again for fl ashing, replace malfunctioning transmitter. Refer to WT-
43, "Transmitter (Pressure Sensor)".
2. Carry out ID registration of all transmitters.
Can ID registration of all transmitters be completed?
YES >> GO TO 3
NO >> GO TO WT-14, "
Data from Transmitter Not Being Received".
DTC CONSULT-III DTC detecting condition
C1712 [CHECKSUM - ERR] - FL Checksum data from FL transmitter is malfunctioning.
C1713 [CHECKSUM - ERR] - FR Checksum data from FR transmitter is malfunctioning.
C1714 [CHECKSUM - ERR] - RR Checksum data from RR transmitter is malfunctioning.
C1715 [CHECKSUM - ERR] - RL Ch ecksum data from RL transmitter is malfunctioning.
C1720 [CODE - ERR] - FL Function code data from FL transmitter is malfunctioning.
C1721 [CODE - ERR] - FR Function code data from FR transmitter is malfunctioning.
C1722 [CODE - ERR] - RR Function code data from RR transmitter is malfunctioning.
C1723 [CODE - ERR] - RL Function code data from RL transmitter is malfunctioning.
C1724 [BATT - VOLT - LOW] - FL Battery voltage of FL transmitter drops.
C1725 [BATT - VOLT - LOW] - FR Battery voltage of FR transmitter drops.
C1726 [BATT - VOLT - LOW] - RR Battery voltage of RR transmitter drops.
C1727 [BATT - VOLT - LOW] - RL Battery voltage of RL transmitter drops.
Revision: December 20092009 QX56

C1712 - C1715, C1720 - C1723, C1724 - C1727 TRANSMITTER MALFUNCTION
WT-17
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3.DRIVE VEHICLE
1. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
2. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Replace malfunctioning transmitter, and perform Step 3 again.
Special Repair RequirementINFOID:0000000003772379
Perform preliminary check. Refer to WT-5, "Preliminary Check".
Revision: December 20092009 QX56

WT-18
< COMPONENT DIAGNOSIS >
C1716 - C1719 TRANSMITTER PRESSURE MALFUNCTION
C1716 - C1719 TRANSMITTER PRESSURE MALFUNCTION
DescriptionINFOID:0000000003772380
Air pressure data from one or more transmitters is out of range.
DTC LogicINFOID:0000000003772381
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Refer to WT-18, "
Transmitter Pressure Malfunction".
Transmitter Pressure MalfunctionINFOID:0000000003772382
MALFUNCTION CODE NO. 35, 36, 37 OR 38 (DTC C1716, C1717, C1718 OR C1719)
1.CHECK ALL TIRE PRESSURES
Check all tire pressures. Refer to WT-45, "
Tire".
Are there any tires with pressure of 64 psi or more?
YES >> Adjust tire pressure to specified value.
NO >> GO TO 2
2.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters. Refer to WT-6, "
ID Registration Procedure".
2. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
3. Check all tire pressures with CONSULT-III within 15 minutes after vehicle speed becomes 17 km/h (11
MPH).
Does
“DATA MONITOR ITEM” display 64 psi or more?
YES >> Replace transmitter. Refer to WT-43, "Transmitter (Pressure Sensor)". GO TO 3.
NO >> GO TO 3
3.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Proceed to the inspection applicable to DTC.
Special Repair RequirementINFOID:0000000003772383
Perform preliminary check. Refer to WT-5, "Preliminary Check".
DTCCONSULT - III DTC detecting condition
C1716 [PRESSDATA - ERR] FL Air pressure data from FL transmitter is malfunctioning.
C1717 [PRESSDATA - ERR] FR Air pressure data from FR transmitter is malfunctioning.
C1718 [PRESSDATA - ERR] RR Air pressure data from RR transmitter is malfunctioning.
C1719 [PRESSDATA - ERR] RL Air pressure data from RL transmitter is malfunctioning.
Revision: December 20092009 QX56

C1729 VEHICLE SPEED SIGNALWT-19
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C1729 VEHICLE SPEED SIGNAL
DescriptionINFOID:0000000003772384
The vehicle speed signal is not being detected by the BCM.
DTC LogicINFOID:0000000003772385
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On “SELECT DIAG MODE”, select the “SELF-DIAG RESULT” screen.
2. Check display contents on "SELF DIAG RESULT" screen.
Is the
“CAN COMM CIRCUIT” displayed in the self-diagnosis display?
YES >> Refer to WT-19, "Vehicle Speed Signal".
NO >> Inspection end.
Vehicle Speed SignalINFOID:0000000003772386
MALFUNCTION CODE NO. 52 (DTC C1729)
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On “SELECT DIAG MODE”, select the “SELF-DIAG RESULT” screen.
2. Check display contents on "SELF DIAG RESULT" screen.
Is the
“CAN COMM CIRCUIT” displayed in the self-diagnosis display?
YES >> Perform trouble diagnosis for CAN communication system. Refer to LAN-4.
NO >> Check combination meter. Refer to MWI-5
.
DTCCONSULT - III DTC detecting condition
C1729 VHCL SPEED SIG ERR Vehicle speed signal is in error.
Revision: December 20092009 QX56

WT-20
< COMPONENT DIAGNOSIS >
C1735 IGNITION SIGNAL
C1735 IGNITION SIGNAL
DescriptionINFOID:0000000004221465
The BCM monitors the IGN ON signal on the CAN line and compares it to it’s direct IGN ON signal. When
these two signals do not match, the BCM sets C1735.
DTC LogicINFOID:0000000004221466
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On SELECT DIAG MODE, select the SELF-DIAG RESULT screen.
2. Check display contents on SELF DIAG RESULT screen.
Is C1735 displayed in the self-diagnosis display?
YES >> Refer to WT-20, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000004221467
MALFUNCTION CODE NO. 54 (DTC C1735)
1.CAN IGNITION SIGNAL
Check BCM IGN RLY signal with CONSULT-III. Refer to BCS-38, "
Reference Value".
Are the inspection results normal with the ignition switch ON?
YES >> GO TO 2.
NO >> Check CAN system. Refer to LAN-44, "
CAN System Specification Chart".
2.BCM POWER SUPPLY
Check BCM power supply (ignition ON). Refer to BCS-32, "
Diagnosis Procedure".
Is the power supply with the ignition switch ON normal?
YES >> GO TO 3.
NO >> Repair power supply as necessary.
3.DRIVE VEHICLE
Clear DTC and then test drive the vehicle and check the low tire pressure warning lamp.
Does the vehicle operate without any low tire pressure warning lamp?
YES >> Inspection End.
NO >> Replace BCM. Refer to BCS-56, "
Removal and Installation".
DTCCONSULT - III DTC detecting condition
C1735 IGNITION SIGNAL LINE - BCM/TPMS BCM has detected a mismatch between IGN ON signals.
Revision: December 20092009 QX56

TPMS
WT-29
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SYMPTOM DIAGNOSIS
TPMS
Symptom TableINFOID:0000000003772391
Symptom Reference
Low tire pressure warning lamp does not come on when ignition switch is turned on. WT-30
Low tire pressure warning lamp stays on when ignition switch is turned on.WT-31
Low tire pressure warning lamp flashes when ignition switch is turned on.WT-32
Hazard warning lamps flash when ignition switch is turned on.WT-33
Tire pressure information in display unit does not exist.WT-35
ID registration cannot be completed.WT-35
Revision: December 20092009 QX56